DE2720071C2 - Tensile, flexible electrical cable - Google Patents

Description

jacket 2 applied and wear on their outside an intermediate layer 5 made of a tape-shaped plastic film. The tension elements 3 applied to this with the lay direction opposite to the inner layer 7 and support strands 4 of the outer layer 8 are enclosed by an outer jacket 6.

1 sheet of drawings

10

15th

20th

35

40

%

pi

Claims (3)

1 2 flexible support strands with a simple structure, high demands on flexibility and can be manufactured more economically from uncoated tension elements. Since the individual 1. Tensile, flexible, electrical cable with one each with support strands made of a plastic In a concentric layer of strand-like tension elements, 5 good glass properties, separate tension elements from possibly stranded, high-strength thr move to each other and to the support strands Plastic threads, can, will be done in a simple manner while avoiding everyone direct friction of the tension elements on one another characterized in that achieved significantly better flexibility for education
development of high flexibility 10 The cable is particularly suitable for mobile connections subject to tensile loads, especially in the maritime best) that overlap in the concentric position (7, 8), such as for dragging neighboring tension elements (3) through measurement, mine clearance and fishing equipment, flexible support strands running between them from measuring buoys or tethered balloons, for energy (4) separated from one another and shiftable between these 15 supply of diving equipment and under water working relative to one another, tend machines, as suspension cables for helicopter b) the tension elements (3) made of plastic threads with single and alpine purposes. With such applications, tensile strength of at least 1960 N / ram ² gene, in view of the often very large cable length, there is a high tensile strength and at the same time great c) the Stätesträäge (4) made of iron other plastic 20 Flexibility when rolling up the cable even under tension material with opposite the plastic threads of the load. Tension elements (3) have good sliding properties stand. Described subclaims. The individual tension elements can, depending on the 2. Cable according to claim 1, characterized by 25 requirements made of monofilaments or one or several each by a thin intermediate sliding plate several parallel running or twisted with one another (5) separate concentric layers of tensile cords made of monofilaments or parallellau- (7, 8) consisting of fends that run alternately next to each other or that are stranded or interwoven Tension elements (3) and support strands (4). Single threads exist. Pulling elements are particularly suitable 3. Cable n / wb claim 2, characterized marked- 30 elements with plastic threads made of linear polyarylamides, net that between two layers (7, 8) with opposite as they are through polycondensation of aromatic monomers Impact direction a sliding liner (5) rer can be obtained. The support strands can be advantageous ribbon-shaped plastic film is arranged adhesive made of polyester or polyamide, in particular in the form of stranded or intertwined individual threads 35 den. For a twist-free cable, an even number of concentric to the longitudinal axis of the cable is expedient The invention relates to a high tensile strength, flexible electrical layers with alternately opposing layers Trical cable provided with a concentric position strangför- direction of impact. If between the bemiger Tension elements made of possibly stranded high-quality layers a thin intermediate layer made of synthetic material Plastic threads. . fabric film, preferably polyester film, is arranged, The cable known from DE-OS 24 33 099 this is any direct contact in the radial direction Art have avoided tension elements coaxially adjacent to the electrical conductors without the transverse end Tension elements made of high-strength plastic, cut the cable to enlarge it significantly. Through this especially polyarylamide, each with an elastic coating compared to cables with plastic coating Sheath made of wrapped foil tape or one of the tensile elements, a cable with two-day Zugarma sheath braid made of plastic wire or an artificial door with a smaller cross-section, fabric coating can be provided. This cable is due to this cross-sectional reduction and the UΓη-own although in comparison with pull fittings that stood out from that on the different sides of the same Steel wires have a significantly lower weight and a tension element arranged support strands and the Zwine improved tensile strength, but for many layers they are independent purposes relative to one another not flexible enough. As far as they can be pushed up, there is a much higher flexist level Tension elements wear an elastic sheath, the stability of the cable becomes. ' Not only does the production become considerably more expensive, but the following is a preferred embodiment the cable cross-section also increases, which is further unfavorable 55 of the cable with reference to the drawing stig affects the flexibility When the tension elements are explained. made of high-strength plastic threads are not sheathed, this shows a schematic perspective view in the event of high tensile loads, it mutually destroys the cable with gradually cut away jugs. layers. The electrical cable shown has The object of the invention was now to provide a cable of the eo in its core three insulated electrical conductors 1 on which to create the type mentioned at the beginning, which at high tensile of an inner jacket 2 made of a suitable material, ins- strength at the same time has high flexibility and is surrounded by a special elastic plastic. the can be manufactured in a complex manner. There is a pulling fitting of the cable in the case of the one shown To solve this problem, the cable of the embodiment has an inner layer 7 and one initially mentioned type according to the invention the characteristic 65 outer layer 8, each made of alternately arranged character of claim 1 features mentioned. th tension elements 3 and support strands 4 exist. the The cable has through the respective between adjacent tension elements 3 and the support strands 4 of the inner layer hard tensile elements running, not tensile loaded 7 are with a long impact on the outer surface of the inner